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/**
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* Hachette main content script run in all frames
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*
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* Copyright (C) 2021 Wojtek Kosior
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* Copyright (C) 2021 jahoti
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* Redistribution terms are gathered in the `copyright' file.
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*/
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/*
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* IMPORTS_START
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* IMPORT handle_page_actions
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* IMPORT extract_signed
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* IMPORT gen_nonce
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* IMPORT is_privileged_url
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* IMPORT mozilla_suppress_scripts
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* IMPORT is_chrome
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* IMPORT is_mozilla
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* IMPORT start_activity_info_server
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* IMPORT modify_on_the_fly
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* IMPORTS_END
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*/
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function accept_node(node, parent)
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{
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const clone = document.importNode(node, false);
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node.hachette_corresponding = clone;
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/*
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* TODO: Stop page's own issues like "Error parsing a meta element's
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* content:" from appearing as extension's errors.
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*/
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parent.hachette_corresponding.appendChild(clone);
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}
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if (!is_privileged_url(document.URL)) {
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/* Signature valid for half an hour. */
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const min_time = new Date().getTime() - 1800 * 1000;
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let best_result = {time: -1};
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let policy = null;
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const extracted_signatures = [];
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for (const match of document.cookie.matchAll(/hachette-(\w*)=([^;]*)/g)) {
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const new_result = extract_signed(...match.slice(1, 3));
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if (new_result.fail)
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continue;
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extracted_signatures.push(match[1]);
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if (new_result.time < Math.max(min_time, best_result.time))
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continue;
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/* This should succeed - it's our self-produced valid JSON. */
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const new_policy = JSON.parse(decodeURIComponent(new_result.data));
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if (new_policy.url !== document.URL)
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continue;
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best_result = new_result;
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policy = new_policy;
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}
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if (!policy) {
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console.warn("WARNING! Using default policy!!!");
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policy = {allow: false, nonce: gen_nonce()};
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}
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for (const signature of extracted_signatures)
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document.cookie = `hachette-${signature}=; Max-Age=-1;`;
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handle_page_actions(policy.nonce);
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if (!policy.allow) {
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const old_html = document.documentElement;
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const new_html = document.createElement("html");
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old_html.replaceWith(new_html);
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old_html.hachette_corresponding = new_html;
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const modify_end =
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modify_on_the_fly(old_html, policy, {node_eater: accept_node});
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document.addEventListener("DOMContentLoaded", modify_end);
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}
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start_activity_info_server();
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}
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